Information received on 5 Mar 2021 from Dr. Emeli Torsson, Senior
Veterinary Advisor, Sweden

Summary
Report type: Immediate notification
Date of start of the event: 2 Mar 2021
Date of confirmation of the event: 3 Mar 2021
Reason for notification: Recurrence of a listed disease
Date of previous occurrence: 19 Nov 2020
Manifestation of disease: Clinical disease
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5N5
Nature of diagnosis: Laboratory (basic and advanced)
This event pertains to a defined zone within the country.

New outbreaks (1)
Summary of outbreaks
Total outbreaks: 1
Outbreak location: Trelleborg [Skane County]
Date of start of the outbreak: 2 Mar 2021
Outbreak status: Continuing (or date resolved not provided)
Epidemiological unit: Farm
Total animals affected:
Species / Susceptible / Cases / Deaths / Killed and disposed of /
Slaughtered
Birds / 18 000 / 3000 / 3000 / 15 000 / 0
Affected population: This is a farm with organic laying hens, housing
around 18 000 animals. Clinical signs of increased mortality were seen
2 Mar 2021.

Epidemiology
Source of the outbreak(s) or origin of infection: Unknown or
inconclusive
Epidemiological comments: All animals were euthanized on 3 Mar 2021.
Disinfection of the holding was completed on 4 Mar 2021. A protection
zone (3 km [1.9 mi]) and a surveillance zone (10 km [6.2 mi]) have
been put in place around the infected farm, and all other restrictions
and necessary measures according to Directive 2005/94/EC are applied.

Control measures
Measures applied: Movement control inside the country; surveillance
outside containment and/or protection zone; surveillance within
containment and/or protection zone; zoning; stamping out; official
destruction of animal products; official disposal of carcasses,
by-products, and waste; disinfection

Diagnostic test results
Laboratory name and type / Species / Test / Test date / Result
National Veterinary Institute (national laboratory) / Birds /
Real-time PCR / 3 Mar 2021 / Positive
National Veterinary Institute (national laboratory) / Birds / Virus
sequencing / 3 Mar 2021 / Positive

Future reporting
The event is continuing. Weekly follow-up reports will be submitted.